I've been looking today at getting a proper camera bag as what i'm doing at the moment is just putting everything in the bottom of a normal bag such as this:

I'm afraid of damaging anything if its all just bumping around in the bottom of the bag. I don't really do many long treks or anything like that its just mainly for going wherever I go with my camera stuff.

My other reason to get one is that all my camera stuff is just spread out over my desk and I'd love it to be organised in a proper bag so I can take it out as I need and put it back and it will all be neat.

I'm not sure whether to get one at all, but if I did I think I'd like a waterproof one but they seem to cost quite a lot more.

Are there any cheap waterproof ones or is it more of a "you get what you pay for" situation?

I really like my little bag. I have since also bought a bigger backpack style one, but haven't used it much yet.

Both are not waterproof, but do come with a waterproof outer wrap you put over it if needed. It is inconvenient, but it's ok for occasional use if you can plan to avoid being out in the rain.

My only word of advice would be don't get too big a bag unless you are sure you need it. I found the temptation to pack everything I have in my larger one which means carrying more weight than really necessary.